My parents have promised to come to see me before I ___for Africa.
| A．have left | B．leave | C．left | D．will leave |
After the new equipment was introduced, they produced ______machines this year as the year before.
| A．as twice many | B．as many twice |
| C．twice as many | D．twice many as |
ˉWhat do you think made Tom so upset?
ˉ ______her new bicycle.
| A．Because of | B．Lost | C．As she lost | D．Losing |
It is not how much we learn but how much we understand ______ benefits us so much in our daily life.
| A．which | B．that | C．what | D．who |
As a businessman he was a success, but as a husband he was ______failure, so their marriage ended in______ failure.
| A．/; / | B．/; a | C．a; a | D．a; / |
The person in charge of the meeting asked the people present to sit ______ together and listen______.
A. closely; close B close; closely
C. close; close D. closely; closely