We will see you again next Saturday. ______, you must rest as much as possible and take good care of yourself．
| A．However | B．Meanwhile | C．Otherwise | D．Therefore |
_______ from the moon, our earth, with water _______seventy percent of its surface, appears a blue ball
| A．Seen; covered | B．Seeing; covering |
| C．Seen; covering | D．Seeing; covered |
Small sailboats can easily turn over in the water ________.
| A．if not managed carefully | B．if are not managed carefully |
| C．unless not managed carefully | D．unless are not managed carefully |
Tom ______ to me that the rooster which _______ in the corner _______ an egg.
| A．lied; lay; had lain | B．lied; laid; had lain |
| C．lied; lay; had laid | D．lay; lied; had laid |
They did not find ________ to prepare for the worst conditions they might meet.
| A．it worthy | B．it worthwhile | C．it worth | D．worth their while |
You can not imagine that a well-behaved gentleman _______be so rude to a lady.
| A．might | B．need | C．should | D．would |