He seems too tired today, and I wonder__________ he got a good sleep last night.

That black T-shirt with Yao Ming’s picture on it ____ belong to David. He likes him very much.—No, it ____ be his. He hates black colour.

Someone called me up in the middle of the night, but they hang up ____ I could answer the phone.

____ is said that the terrible accident happened at midnight

It ______ 3 years since I _____ to No. 1 Middle School.