Most people have come to realize that it is about time the government __ further measures to control the population.
A．must take
B．is taking
C．takes
D．took
在20世纪30年代，可以产出绿色或褐色纤维的特种棉花就已经出现了。但是，直到最近培育出一种可以机纺的长纤维品种之后，它们才具有了商业上的价值。由于这种棉花不需要染色，加工企业就避免了染色的开销以及由于除去残余的染料及其副产品所带来的生态危险。如果以上论述为真，可以推出以下哪个结论？
A．就生态而言，加工长纤维棉花要比加工短纤维棉花更安全。
B．只能手纺的绿色或褐色棉花在商业上不具有价值。
C．就生态而言，手纺的棉花比机纺的棉花会更安全。
D．n短纤维的普通棉花从经济角度说比合成纤维更有竞争力。
We are all for your proposal that the discussion ______.
A．be put off
B．was put off
C．should put off
D．is to put off
Paul: Do you have to have that TV on quite so loud？ Carol: __ Is it bothering you？Paul: Yes, I'm trying to sleep.
A．Oh, I'm sorry.
B．Oh, excuse me.
C．No, I don't.
D．Yes, I have to.
如果L的讲座被安排紧接在J之后，则一共有多少场讲座必须被安排在L的讲座之前？
A．二场。
B．三场。
C．四场。
D．五场。
People appreciate __ with him because lie has a good sense of humor.
A．to work
B．to have worked
C．working
D．having worked