The teacher, with 6 girls and 8 boys of her class, ________ visiting a museum when the earthquake struck.
| A．was | B．were | C．had been | D．would be |
The road is covered with snow. I can’t understand ________ they insist on going by motor-bike.
| A．why | B．whether | C．when | D．how |
— Are you still thinking about yesterday’s game?
— Oh, that’s ____________.
| A．what makes me feel excited | B．whatever I feel excited about |
| C．how I feel about it | D．when I feel excited |
______ made the school proud was ______ more that 90% of the students had been admitted to key universities.
| A．What…because | B．What…that | C．That…what | D．That…because |
There is a new problem involved in the popularity of private cars ____________ road conditions need ____________.
| A．that; to be improved | B．which; to be improved | C．where; improving | D．when; improving |
It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
| A．that | B．when | C．what | D．how |