With a lot of difficult problems ____, the manager felt worried all the time.
The man stopped from time to time_______whether he was being followed.
Doctors have said that as many as 50% of patients don’t take medicine_______.
You may take them all home_______.
—Which would you like, chicken or fish? —_______
—You seem to have lost your way. _______? —I’m looking for Wangfujing Street.