Many pregnant women have bought this kind of clothes to ________ radiation.
| A．block | B．protect | C．distinguish | D．guarantee |
A professor and writer ____ present at the meeting last night.
| A．had been | B．were | C．is | D．was |
The boy at the back is the only one of the students who _____ from Africa in our school.
| A．was | B．were | C．is | D．are |
It is not I but you who ______ the first to run to the goal in that competition.
| A．is | B．was |
| C．are | D．is going to |
Each boy and each girl ______ a new book.
| A．have gone | B．has gone |
| C．have got | D．has got |
His brother rather than his parents ______.
| A．are to be blamed | B．is to blame |
| C．are to blame | D．is to be blamed. |