Swimming is， of course， interesting．But ________ we plan to go swimming， being safe must come first． （ ）
| A． |
though |
B． |
when |
C． |
unless |
相关试题
B．
C．
D．
It's too hot today．
Yes． Why don't you your jacket？（ ）
A．put onB．put upC．take offD．take after
Students in our school ________ know shouting is not allowed in the library．（ ）
A．canB．mayC．mustD．need
The little boy his seat to an old lady on the crowded bus．（ ）
A．lentB．offeredC．tookD．brought
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