I was not _________her presence till she spoke to me.
| A．aware | B．aware about | C．aware of | D．aware to |
--Hi, Jack! We’re going to have a walk along the beach this Sunday.
--_______. I love sunshine.
| A．By all means | B．Go ahead |
| C．Count me in | D．With pleasure |
________ the market in three months, the new product will make a big difference.
| A．Hitting | B．To hit |
| C．Having hit | D．Hit |
Mary _______ have arrived ten minutes earlier but her flight was held up because of the heavy fog.
| A．need | B．can | C．should | D．must |
________ you have learned should be made good use of ________ making mistakes in the coming college entrance exam.
| A．What; avoiding | B．That; avoiding |
| C．What; to avoid | D．That; to avoid |
I plan to move to the countryside as the air there is much fresher than________ in the city.
| A．ones | B．that | C．one | D．those |