---- Has Sam finished his homework today? ---- I have no idea. He ________ it this morning.
#72694
A
did
B
has done
C
was doing
D
had done
推荐题目
Many students are ________ chatting online, which wastes them plenty of time.
#64601
A
crazy about
B
connected with
C
worried about
D
anxious about
Mary never ideas for clever party decorations.
#81661
A
keeps out of
B
gives out
C
runs out of
D
wears out
As is known to all, theory is based on practice and _____ serves practice.
#70919
A
in hand
B
in turn
C
in return
D
in exchange
Co-operation or teamwork, the importance of which is often ________, plays an important part in football matches.
#74066
A
stressed
B
thought of
C
paid much attention
D
talked
We have _________ our position on the issue (期刊)! Whatever happens, we won’t change it.
#65118
A
introduced
B
explained
C
clarified
D
acquired