It must have rained last night, ________ the ground is wet now.
| A．for | B．because | C．since | D．now that |
It never occurred to humans until the mid-1990s ______ some animals can be cloned.
| A．where | B．that | C．when | D．what |
I’ll prepare more dishes_________ your guests decide to stay for dinner．
| A．in case | B．in order that | C．even if | D．as if |
Large quantities of information, as well as some timely help _____ since the organization was built .
| A．has offered | B．had been offered | C．have been offered | D．is offered |
I am junior________my elder brother________four years.
| A．to, by | B．than, for | C．to, for | D．with, by |
Was it the restaurant where he had dinner with me, if I may ask, _______offered him a job?
| A．that | B．where | C．which | D．when |