___________the students came from different countries，they got on well in the camp．（ ）
A．WhenB．UnlessC．ThoughD．Until
﹣﹣﹣We should try to devote（献身于）ourselves to our country like Yuan Longping.
﹣﹣﹣I think so.He still worked on the research into agriculture（农业）at the age of _________.（ ）
| A． |
eighties |
B． |
eightieth |
| C． |
eighty |
D． |
eighty﹣year﹣old |
﹣﹣﹣Hello，Eric.You look tired.
﹣﹣﹣Yes.I've decided to have a good _________ by taking a walk or seeing a movie.I really need to relax.（ ）
| A． |
meal |
B． |
sleep |
C． |
luck |
D． |
rest |
The man did a great job in fighting COVID﹣19.He on TV and became very known.（ ）
| A． |
interviewed |
B． |
has interviewed |
| C． |
was interviewed |
D． |
will be interviewed |
-Are you going to the airport by bus？
-I'd rather take a taxi.It's .
| A． |
quicker |
B． |
cheaper |
| C． |
the quickest |
D． |
the cheapest |
-How do we turn on the oven？
-I you，weren't you listening？（ ）
| A． |
tell |
B． |
am telling |
C． |
will tell |
D． |
have told |