________our earth,or else it will be no longer fit for us to live on.
| A.Protecte | B.To protect | C.Protecting | D.Protect |
What the doctors really doubt is ____my mother will recover from the serious disease soon .
| A.when | B.if | C.whether | D.what |
--I like Tom very much _____he sometimes gives me some trouble.
-- Oh, it’s unbelievable.
| A.even if | B.as if | C.even now | D.as though |
Our English teacher advises us ____________ more after class.
| A.to practice to speak | B.practicing to speak |
| C.to practice speaking | D.practicing speaking |
— How was your weekend?
— Great! We ______ a picnic by the lake.
| A.have | B.are having | C.had | D.will have |
______ get a better score, she has been studying hard all day.
| A.So as to | B.In order to |
| C.So that | D.In order that |