The young man，who by then admission to university，decided to do some part-time jobs to gain more practical experience．
| A．gained | B．was gaining | C．has gained | D．had gained |
He didn not go by bike with me.That is ______there was something wrong with his bike.
A,why B,how C,because D,Whether
_____is today Britain used to be three different countries,and over many years the three countries became one.
A,It B,What C,Where D,As
At that time,it seemed _____I could not think of the right word anyhow.
A,even if B,in case C,as if D,in order
______is estimated that a round-trip to Mars would take more than a year.
A,That B,what C,There D,It
______leaves the room last ought to turn off the lights.
A,The person B,whoever C,Who D,Anyone