. --So hard __________ in the past few months that he has made great progress in English. --I can see that, only a few mistakes he made in this exam.
#103811
A
he worked
B
did he work
C
he has worked
D
has he worked
推荐题目
_____people who learn Engiish as a foreign language ________more than 750 million.
#99520
A
A number of... reach
B
The number of...come to
C
The number of... reaches
D
A number of...comes to
—Alice, why aren’t you at work today?—I a day off．
#102771
A
have given
B
have been given
C
gave
D
was given
The famous musician, as well as his students, ____ to perform at the opening ceremony of the 2012 Taipei Flower Expo.
#100587
A
were invited
B
was invited
C
have been invited
D
has been invited
Class is beginning. Will you please get the blackboard .
#103250
A
to clean
B
cleaning
C
cleaned
D
having cleaned