The river______ are covered with trees is polluted.
| A．of which the banks | B．whose banks | C．the banks of which | D．A,B,C are right |
necessary experience for my future career, I take an active part in social activities in college.
| A．To gain | B．Gain | C．Gaining | D．Having gained |
Cindy, to be here at 8 o’clock.
| A．is sure | B．is sure that | C．will be sure | D．be sure |
Lady Gaga has put off her concerts because of the difficulties by the ongoing strikes.
| A．caused | B．causing | C．to be caused | D．having caused |
Focused on your heart asks you to do, you’ll realize your dream one day.
| A．that | B．which | C．what | D．it |
By the end of last week, nearly 80 percent of the work .
| A．have finished | B．had been finished | C．will be finished | D．was finished |