Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
相关试题
the large amount of time devoted to playing the piano, she doesn’t play well enough.
| A．Because | B．Since | C．Despite | D．With |
With challenges before you, you should believe your courage is makes a difference.
| A．that | B．what | C．which | D．whatever |
Our chemistry teacher announced that he would do the experiment in a different way
we might find interesting.
| A．which | B．in which | C．in that | D．whom |
While she is a lovely girl, she be extremely difficult to work with.
| A．may | B．must | C．should | D．can |
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