Mary made a few changes to the design and made her own needle, _____ saving people a lot of time.
| A．one | B．she | C．that | D．it |
---- Isitinthatfactory__________“RedFlag”carsareproduced?
---- No, they are produced in our factory.
| A．inwhich | B．where | C．which | D．that |
We’retalkingaboutthepianoandthepianist_____wereintheconcertweattendedyesterday.
| A．which | B．whom | C．who | D．that |
Thefreezingpointisthetemperature__________waterchangesintoice.
| A．atwhich | B．when | C．inwhich | D．ofwhich |
Don’t talk about such things _______ you are not sure about.
| A．which | B．that | C．as | D．what |
Hurry! The train _______. You know it _____at 8:30am. .
| A．leaves; leaves | B．is leaving; leaves |
| C．leaves; leaving | D．is leaving; is leaving |