用括号内所给动词的适当形式填空,必要时可加助动词或情态动词。
1. The telephone ____________ (invent) by Bell in 1876.
2. Teenagers should be allowed _____________ (choose) their own clothes.
3. I practice my listening by _____________ (listen) to the tape over and over again.
4. Could you please tell me where I can get something ___________ (eat)?
5. Look! He must ______________ (run) to catch a bus.
1. was invented 2. to choose 3. listening 4. to eat 5. be running