________ the question of how global warming has _________, we are doing some projects at school.
| A．Exploring, come about | B．To explore, come out |
| C．Having explored, come to | D．Being explored, come over |
However hard he tries，the recorder.
| A．didn’t work | B．won’t work | C．isn’t working | D．hasn’t worked |
The man was hit the head a stone while traveling in the mountain.
| A．on: with | B．in; by | C．ON; by | D．in; with |
—Sorry for being late for the party.
—earlier next time, will you?
| A．Coming | B．To come | C．Having come | D．Come |
—How delicious the noodles are!
—Yes. It would tastewithtomatoes.
| A．better; many | B．best; many | C．better; more | D．best; more |
Buying clothesa hard job because the clothes a person likesnot very often fit him or her.
| A．are: d0 | B．is; does | C．are; does | D．is; do |