If she ______ her English, she can ask Miss Green for help.

People try to avoid public transportation delays by using their own cars,and this creates further problems.[ ]

How unhappy your roommate looks!—Yes, but he’s not willing to tell me what it is _______ is troubling him.

The computer was used in teaching.As a result，not only ________，but students became more interested in the lessons.

Jack said,“I take _______ both my father and my mother.”