. David_________the test for further study in the USA. Let’s have a small party to congratulate him on his success.A. has passed B. has been passing C. is passing D. had passed
----- What’s the model plane look like? ----- Well, the wings of the plane are ______ of its body.
____ at a college or university in the USA, Chinese and other international students must demonstrate a strong ability in spoken and written English.
With a lot of difficult problems ____, the manager felt worried all the time.
As we all know, it was _____ that resulted in the terrible car accident.
In order not to be disturbed ,I spent three days ________ in my study.