There is no doubt_______ English is the widely used language all over the world.
| A．that | B．whether | C．if | D．how |
He had his camera ready ________ he saw something that would make a good picture.
| A．even if | B．if only | C．in case | D．so that |
I travel to the Binhai New Area by light railway every day，________ do many businessmen who live in downtown Tianjin.
| A．as | B．which | C．when | D．though |
Jack wasn't saying anything，but the teacher smiled at him ________ he had done something very clever.(2011·湖南)
| A．as if | B．in case | C．while | D．thought |
—Did you return Fred's call?
—I didn't need to ________ I'll see him tomorrow.
| A．though | B．unless | C．when | D．because |
Leave your key with your neighbor ________ you lock yourself out one day.(2012·辽宁)
| A．as long as | B．even though |
| C．in case | D．as if |