—Heavy smog (雾霾 )in eastern and central China seems to get more and more serious. —I agree. Something to deal with it.
We won’t go to the Great Wall until the rain _______.
I will give the message to him __________he comes back.
We won’t go to the Great Wall if it ___________ the day after tomorrow.
---What do you think Sam ________ in 10 years? ---A doctor.
Does he often _____ with your brother?