Linda，you weren't at home at five o'clock yesterday afternoon．
I_________soccer with my classmates when you called me． （ ）
A．playB．was playing
C．was play
— Ms.Griffin，what should we do stupid mistakes in the coming exams？
— Be more careful.
A．avoid makeB．avoiding making
C．avoid makingD．to avoid making
— Alice has gone out.
— Oh，has she？What time she ？
A．has；goneB．will；goC．did；goD．is；going
— Jane，I rang you up last night but nobody answered.
— Oh，I together with my parents walks in the park then.
A．have takenB．was taking
C．were takingD．had taken
— I'm afraid that we can't the math problem the teacher helps us.
— That's true.It's too difficult.
A．work on；ifB．work on；unless
C．work out；ifD．work out；unless
— Which country has a population，China or Canada？
— China.Canada is a lot crowded than China.
A．bigger；lessB．bigger；more
C．smaller；lessD．smaller；more