（2014）—Why didn’t you go to school yesterday?
—______ my mother was in hospital and I had to take care of her.
A. Then B. Because C. If
Tony is of the three boys， but he is the tallest．（ ）
A．youngB．younger
C．youngestD．the youngest
I go now， or I'll miss my train．（ ）
A．canB．mightC．mustD．could
Many people like pandas they are cute．（ ）
A．thoughB．ifC．whileD．because
﹣﹣ do you usually go to school， Mary？
﹣﹣By bike．（ ）
A．WhenB．HowC．WhereD．Why
Happy birthday， Peter! Here's a gift you．（ ）
A．forB．inC．withD．from