It was the training he had as a young man made him such a good engineer.
______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
The reason why he was removed was ______he was careless and dishonest. A,when Bbecause C,that D,what
_____she become an artist may have been due to her father”s influence.A,what B,how C,that D,when
his homework, he went out to meet his friends.