A:Do you think Tom will come to the party tonight?B:I don't think so. He has to ________the coming exam.
__________of them got lost. They found the village successfully.(成功地)
I _________ my key in the car and I couldn’t get into my house.
To keep __________, we need ____________ regularly.
To me, English is easier than _________ subject to learn.
Teenagers should learn to protect _________ from all kinds of danger.