His luggage includes two large cases which ________ as much as 50kg.
| A．weighs | B．is weighed | C．weigh | D．are weighed |
-I've studied watching birds as one of my interests. Could I make some suggestions?
――＿＿
| A．You will make it | B．It doesn't matter |
| C．Go right ahead | D．Take it easy |
David said that it was because of his strong interest in literature＿＿he chose the course.
| A．that | B．what | C．why | D．how |
No matter how frequently＿＿，the works of Beethoven still attract people all over the world.
| A．performed | B．performing |
| C．to be performed | D．being performed |
I had wanted to help you last night but I couldn't spare any time, for I＿＿＿a composition which I have to hand in this morning.
| A．wrote | B．was writing | C．had written | D．have written |
Only ticket-holders were＿＿＿to the stadium for the concert given by Jay Chou, so many of his fans were turned away.
| A．allowed | B．permitted | C．agreed | D．admitted |