1. Lily runs ______ than Lucy.
A.fast
B.faster
C.fastest
D.the fastest
答案：B。本题考查副词比较级的用法。A 选项是原级；C 选项是最高级，但本题是两者比较，用比较级；D 选项 the fastest 是最高级，也不符合题意。B 选项 faster 是 fast 的比较级，符合题意。
2. Tom studies ______ than his brother.
A.hard
B.harder
C.hardest
D.the hardest
答案：B。A 选项 hard 是原级；C 选项和 D 选项都是最高级，本题是两者比较，用比较级 harder。
3. My sister sings ______ than me.
A.beautiful
B.more beautiful
C.most beautiful
D.beautifully
E.more beautifully
F.most beautifully
答案：E。本题考查副词比较级。A 选项 beautiful 是形容词；B 选项 more beautiful 是形容词比较级；C 选项 most beautiful 是形容词最高级；D 选项 beautifully 是原级副词；E 选项 more beautifully 是副词比较级，符合题意；F 选项 most beautifully 是副词最高级。
4. Dad walks ______ than Mom.
A.slow
B.slower
C.slowest
D.the slowest
答案：B。A 选项 slow 是原级；C 和 D 选项是最高级，本题是两者比较，用比较级 slower。
5. I do my homework ______ than yesterday.
A.careful
B.more careful
C.most careful
D.carefully
E.more carefully
F.most carefully
答案：E。A、B、C 选项都是形容词，本题要用副词修饰动词，D 选项 carefully 是原级，E 选项 more carefully 是副词比较级，符合题意，F 选项 most carefully 是副词最高级。
6. The teacher speaks ______ than the students.
A.loud
B.louder
C.loudest
D.the loudest
答案：B。A 选项 loud 是原级；C 和 D 选项是最高级，本题是两者比较，用比较级 louder。
7. My dog runs ______ than my cat.
A.quick
B.quicker
C.quickest
D.the quickest
答案：B。A 选项 quick 是原级；C 和 D 选项是最高级，本题是两者比较，用比较级 quicker。
8. She dances ______ than he does.
A.well
B.better
C.best
D.the best
答案：B。A 选项 well 是原级；C 和 D 选项是最高级，本题是两者比较，用比较级 better。
9. We play games ______ than they do.
A.happy
B.happier
C.happiest
D.happily
E.more happily
F.most happily
答案：E。A、B、C 选项是形容词，本题要用副词修饰动词，D 选项 happily 是原级，E 选项 more happily 是副词比较级，符合题意，F 选项 most happily 是副词最高级。
10. He draws ______ than his sister.
A.careful
B.more careful
C.most careful
D.carefully
E.more carefully
F.most carefully
lisa多高答案：E。A、B、C 选项是形容词，本题要用副词修饰动词，D 选项 carefully 是原级，E 选项 more carefully 是副词比较级，符合题意，F 选项 most carefully 是副词最高级。
11.John runs ____ than Tom,but Mike runs the ____.
A.faster/fastest
B.more fast/fastest
C.fastest/faster
D.more fastly/fastest
答案：A。fast 的比较级是 faster，最高级是 fastest。B 选项 more fast 表达错误；C 选项顺序错误；D 选项 fastly 是错误的副词形式。
12.In the race,Lily runs ____ than Lucy and Lily runs the ____ among all the runners.
A.more quickly/most quickly
B.quicker/quickest
C.more quick/most quick
D.quickly/more quickly
答案：A。quickly 的比较级是 more quickly，最高级是 most quickly。B 选项 quicker 是形容词 quick 的比较级，不能修饰动词 run；C 选项 more quick 和 most quick 表达错误；D 选项不符合题意。
13.During the trip,Tom walks ____ than Jack,but Sam walks the ____.
A.more slowly/slowest
B.slower/slowest
C.slowest/more slowly
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