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(
A.What's
B.What
C.Where
B
)2. —B
is your sister doing? —She is dancing.A.What's
B.What
C.Where
答案
2. B
(
—To the library. Because he wants a book about ladybirds.
A.What；doing
B.Where；going
C.Why；going
B
)3. —B
is your brother B
?—To the library. Because he wants a book about ladybirds.
A.What；doing
B.Where；going
C.Why；going
答案
3. B
[典例剖析] 用所给词的适当形式填空。
1. Can't you see that the tadpoles(蝌蚪) (swim) in the stream?
2. —Where's the cat? —It (catch) mice in the attic(阁楼).
1. Can't you see that the tadpoles(蝌蚪) (swim) in the stream?
2. —Where's the cat? —It (catch) mice in the attic(阁楼).
答案
1. are swimming
2. is catching
2. is catching
解析
点拨 第1小题，根据句中的“Can't you see”可知，蝌蚪们“游泳”的动作正在进行，swim 的现在分词形式是双写词尾的字母 m，再加-ing，故填 are swimming。第2小题，问句询问的是“猫在哪里”，答句告知了此刻猫的位置，并补充说明了在这个位置它正在做的事情，catch 的现在分词形式是直接在词尾加-ing，故填 is catching。
