2019年mpacc考试英语真题——介词和介词短语83

{01He spent one day ________ in the room．
A.locking
B.locked
C.to be locked
D.having locked
解析：
本题选B。
{02}At present, the Chinese government is ________ a great many experts who have mastered the rules of the W．T．O．
A.calling on
B.calling for
C.calling at
D.calling up
解析：
本题选B。