--Do you remember ____ he came? --Yes, I do.He came by car.
He _______ to go to Tsinghua University to study after graduating from high school, so he is working very hard.
The thief went into the house at midnight, only ______ by the policemen hiding there.
It is because English is being widely used at present _______.
Mum has always made me ________ my skin problem and encouraged me to use the cream.
After trying hard, they _______ the hope of finding an effective way to solve the problem.