.--- How is everything going on with you in Europe?
--- Quite well, not so smoothly as I hoped, ____.
| A．though | B．instead | C．either | D．too |
While working in the countryside , the students ________ a great deal of knowledge on plant life.
| A．looked up | B．picked up | C．put up | D．called up |
. By the time she ________ tomorrow, the work ________.
| A．arrives ; will be finished |
| B．arrives ; will have been finished |
| C．will arrive ; will have been finished |
| D．arrives ; will have finished |
Some people waste a lot of food ________ others haven’t enough to eat.
| A．however | B．when | C．as | D．while |
When and where to build the new factory _____ yet.
| A．have not decided | B．are not decided |
| C．has not decided | D．is not decided |
I have many friends, ________ some are businessmen.
| A．of whom | B．from which | C．who of | D．of them |