What did the teacher say？
He told us to go over __________lessons．（ ）
A．three firstB．first three
C．the three firstD．the first three
—Peter，what are you doing？
—Oh，I_________a report about national heroes.（ ）
A．will writeB．am writing
C．wroteD．have written
The teacher is glad to see that Tony is_______than before.（ ）
A．carefulB．more careful
C．most carefulD．the most careful
The doctors worked for ten hours，___________nobody took a break.（ ）
A．soB．forC．butD．or
—Sam，_________I join you in the community service？
—Of course you can.（ ）
A．canB．mustC．shouldD．need
—______shall we meet for the picnic？
—At the school gate.（ ）
A．HowB．WhenC．WhyD．Where