________you were coming，I would have stayed at home.
A．If I knowB．Should I knowC．Had I knownD. If I should have known
________ so delicious，the food was sold out soon.
A．TastedB．TastingC．Having been tasted D．Being tasted
—You look a bit worried.What has happened?
—So I do.You see，the computer I got ________ yesterday doesn’t work again.
A．repaired B．to be repairedC．it repaired D．it repairing
This street is very crowded at this time of day.You have to be very cautious while ______.
A．to drive B．being driven C．driving D．having driven
--- When shall I pay the bill?
---Don’t mind it, sir.__________.
A. Please come at your convenience B. Till you are convenient
C. You’ve got to pay it right away D. I don’t mind it either.
The reason why Malaysia Airline Flight370 disappeared remained_____.
A. look intoB. to be looked intoC. looking into D.to look into
