Great attention must be paid __________ welfare, especially in the poor area.
| A．develop | B．to develop |
| C．to developing | D．developing |
I suggest they _______ at once.
A. setting off B .to set off C. set off D have set off
There are three eggs _______ by the hen_______ under the tree.
| A．lied, laying | B．lay, lying | C．laid, lying | D．lain ,laying |
Don’t worry. I’m sure you’ll succeed _______ if you work hard.
| A．on time | B．in time | C．at times | D．ahead of time |
Many rules in English are ______, and large numbers of students feel ______ them.
| A．puzzled; puzzled with | B．puzzling; puzzled about |
| C．puzzled; puzzling with | D．puzzling; puzzling about |
He had to have the washing machine _________ last night.
| A．to mend | B．mending | C．mended | D．being mended |