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【简答题】
苔藓植物作为监测植物是因为苔藓植物叶很薄，对有害气体敏感．______．
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皮皮学刷刷变学霸
举一反三
【简答题】乐音的性质有哪些因素有关联？
【单选题】— Nobody and nothing ______make my uncle smile or laugh. — I'm sure I______ make him laugh.
A.
is able to, will can
B.
was able to, can be able to
C.
is able to, can
【简答题】I like him because he makes me__________ A．to laugh B. laughed C. laugh D. laughing
【单选题】He is very serious. No one can make him _____. [ ]
A.
laugh
B.
laughs
C.
to laugh
D.
laughing
【单选题】Mr Li often makes us _____ in his class, so we all like him. [ ]
A.
laugh
B.
to laugh
C.
laughing
D.
laughed
【单选题】Tom is sad. Everyone is trying to ______. [ ]
A.
cheer up him
B.
laugh at him
C.
cheer him up
D.
set him up
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