It was extremely hot last summer. , it was the hottest summer of the last 50 years.
Liu Hulan was so brave that she showed no signs of _____ to the enemy even under torture(拷问) .
Believe it or not, there is no such thing __________ “standard English”.
We are happy that the project has been finished ahead of _______.
It was in the lab __________ my father did the experiment yesterday evening.
The children asked her mother ______________ go out to play tennis.