The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |
Dorothy was always speaking highly of her role in the play, ____, of course, made the others unhappy.
| A．who | B．which | C．that | D．what |
The teacher had a _______ look when he found that none of his students had finished his homework.
| A．shocking | B．shocked | C．bored | D．boring |
I will keep on trying, ______ I might fail a thousand times.
| A．while | B．as if | C．even if | D．otherwise |
_____ from the mountain, the town is very beautiful.
| A．Being seen | B．It was seen | C．Seen | D．Seeing |
—I did very poorly in last week’s test.
— ____ Look at your paper. You got a good mark.
| A．Oh, come off it! | B．Absolutely. |
| C．You’re dead right. | D．You’ve got a point there. |