______ which school was suitable for their son, the parents visited lots of different primary schools in the city.
| A．To find | B．Being found | C．Found | D．Finding |
Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
| A．it; what | B．what; what | C．what; it | D．it; it |
One can ______ BBC _____ the air early with his Short-wave radio.
| A．pick up; on | B．pick out; over | C．pick up; through | D．pick up; by |
— How many teachers are party members in your school?
— Party members_________ one fifth of the number of the teachers in our school.
| A．take up | B．set up | C．make up | D．fix up |
Jim was born on a farm, _____, he knows little about farming.
| A．thus | B．and | C．yet | D．otherwise |
______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
| A．What; whose | B．What; whom | C．It; whose | D．As; whom |