By the time Einstein was 14 years old, he himself advanced mathematics.
| A．has taught |
| B．taught |
| C．had taught |
| D．was teaching |
When you go abroad，you’ll find the food at home is___ better than __ outside．
| A．far；that | B．much；the one | C．very；that | D．a lot；one |
He knows China very well. That is，he has__ good understanding of___ Chinese history.
| A．／；the | B．／；／ | C．a；a | D．a；／ |
I always take something to read when I go to the doctor’s I have to wait.
| A．as if | B．in order | C．so that | D．in case |
I have had my bike , and I’m going to have John my radio tomorrow.
| A．repair; to repair | B．repairing; to be repaired |
| C．repaired; repair | D．to repair; repairing |
The little boy is dirty from head to foot because he in the mud all morning.
| A．has played | B．has been playing | C．is playing | D．was playing |