- ______ is worth doing well.
- Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes to classroom tests.
- How have you been doing recently?—-________.Nothing really goes wrong.
- I am lucky ______ the thing I enjoy doing most is ______ I’ve ended up doing.
- To succeed in doing an experiment,________.
- You should do the things worth ____, and if you have difficulty _____ them, you can turn to your family.
- What are you doing _ Monday morning?[ ]
- What are you doing ______ vacation? —I’m going fishing. [ ]
- What are you doing _____vacation?[ ]
- Betty, what are you doing now? —I’m waiting ____________ the bus. It takes me to school every morning.[ ]