Recent campus tragedies show that safety measures are so important that we _______ take them too seriously.
| A．can’t | B．should | C．mustn’t | D．shall |
Living in the desert involves a lot of problems，______water shortage is the worst.
| A．of which | B．when | C．of whose | D．Which |
Only when you have obtained enough data______ come to a sound conclusion.
| A．can you | B．you can | C．would you | D．you would |
Lessons______easily are soon forgotten．
| A．1earn | B．learned | C．to learn | D．learning |
If the building project______by the end of this month is delayed，the construction company
will be fined．
| A．being completed | B．completed | C．to be completed | D．completing |
I usually do the washing up and leave the cooking to my wife，______she’s a better cook than me．
| A．unless | B．as | C．even though | D．in case |