There is a natural phenomenon scientists call the greenhouse effect.
| A．that | B．what | C．for which | D．who |
---- Is this the recorder you wish to _______ ? ----- Yes, it is .
| A．repair it | B．have repaired | C．have it repaired | D．be repaired |
.Mrs Green was disappointed to see the washing machine she had had ______ went wrong again.
| A．repaired | B．to repaired | C．repairing | D．it to be repaired |
--- How did you find your visit to Qingdao , Joanna ? ----- ____________ .
| A．Oh, wonderful indeed | B．I went there alone |
| C．First by train and then by ship | D．A guide showed me the way |
He has entertained hopes of being admitted to a sight of the wonderful valley , of ____ beauty he has heard .
| A．which | B．of whose | C．whose | D．form which |
So long as there are more people than needed , there _____ be tests to help make a fairer decision .
| A． shall | B．must | C．may | D．can |