— Why is your father so busy these days? — He is _________ for my grandfather’s _________ birthday party.
#53448
A
preparing; ninth
B
preparing; ninetieth
C
waiting; ninth
D
waiting; ninetieth
推荐题目
Bob used to  in the countryside .but mow he is used to     in the big city 
#53533
A
live ;live
B
live; living
C
living ; living
D
living; live
—Will you give me a hand? I have some trouble_______ the scientific problem.—Don't worry. I'll try my best to help you _______.
#52243
A
solving; in five minutes
B
to solve; in five-minute
C
to solve; after five minutes
D
solving; after five-minutes
Don't ______ the window. Listen to me carefully.
#54378
A
look out
B
look out of
C
look out at
D
look at