The North Pole is ____ all the white snow here and there all the year round.
| A．full of | B．fill with | C．covered by | D．covered with |
．I’m sorry you’ve been waiting so long， but it’ll still be some time ____ Brian gets back.
| A．before | B．since | C．till | D．after |
The house I grew up ________ has been taken down and replaced by an office building.
| A．in it | B．in | C．in that | D．in which |
．I invited Mary and Jane to dinner, but of them came.
| A．none | B．either | C．both | D．neither |
．The plant is dead . I ________ it more water.
| A．will give | B．would have given | C．must give | D．should have given |
．The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |