It is important to introduce children to healthy nutritious foods from ________ they begin to eat solids.
| A．what | B．when |
| C．that | D．which |
– Is John coming by train?
– He should, but he _______ not. He likes driving his car.
| A．must | B．can | C．need | D．may |
– I rang you at about ten o’clock, but there was no reply.
– Oh, that was probably ________ I was seeing the doctor.
| A．when | B．why | C．what | D．that |
It will be more than 100 years ____ the country begins once again to look as it did before.
| A．when | B．since | C．before | D．that |
The situation is more _________ than ever. I’m _______about what to do next.
| A．puzzled; puzzled | B．puzzling; puzzling |
| C．puzzling; puzzled | D．puzzled; puzzling |
– Can you tell me ___________?
– An engineer from Jinan Iron and Steel Plants.
| A．what your friend is | B．who your friend is |
| C．what is your friend | D．who is your friend |