________ material used for running tracks in schools across China may be ________ danger to children's health.
| A．/；a | B．The；a | C．/；the | D．The；the |
I would appreciate ____ if you could pick me up at the airport tomorrow morning.
| A．it | B．/ | C．that | D．this |
The place _______interested me most was the Children's Palace.
| A．which | B．where | C．what | D．in which |
First of all, I hope that we shall never lose _____ heart in face of_____ failure.
| A．the; a | B．the; the | C．不填; 不填 | D．a; 不填 |
—Could you tell me the function of this paragraph from the whole text?
— _____. I didn’t understand what you just said.
A. I beg your pardon B. All right C it’s nothing serious D. Not really
A new branch of the company is going to be open. ____, the decoration of its main store has been finished.
| A．Instead | B．However | C．Therefore | D．Meanwhile |