— the team finished most of their research work?
—Yes, but the rest rather difficult.
A.Has, are | B.Has, is | C.Have, are | D.Have, is |
_____ I’m willing to help, I do not have much time available.
A.While | B.When | C.Once | D.Since |
The rise of oil prices made scientists search for new energy resources ______ oil.
A.replace | B.replacing | C.to replace | D.replaced |
You didn’t believe John won the first prize at the speech competition, ______?
A.did he | B.didn’t he | C.did you | D.didn’t you |
I had reached a point in my career _____ I needed to decide which way to go.
A.why | B.which | C.when | D.where |
Here are some new computer programs _____ for home buildings.
A.designing | B.design | C.to design | D.designed |