Try not to cough more than you can_____since it may cause problems to your lungs

When will the expert come and give the lecture on intellectual property?—Not until our program _______ by the authorities.[ ]

After recovering from his illness, he was advised to ________ gardening as a hobby.

In a sports team each player has a clearrole，and there arefew occasions members areconfused or uncertain of their roles

a little earlier, you could have caught the last bus.