You must be careful when you swim ________ the lake.
A. across B. below C. over D. through
To our great surprise，the old man ended up ________ himself in his house.
A. kill B. killing C. to kill D. to killing
(2013山东济宁)The earthquake in Ya’an left________people homeless．
A. two thousands
B. thousands of
C. two thousands of
D. two thousand of
—It’s a long story, but you can hardly find new words in it.
—Good! ______ it will be too hard for children.
A. so B. Though
C. unless D. Or
Actor Orson Welles described ______ in his famous trick.
A. where had aliens landed B. where aliens had landed
C. where will aliens land D. where aliens will land
— Did you see the two boys on the playground?
— Yes. But I saw one leave with a bike, and _______ playing basketball alone.
A. another B. others C. other D. the other
