9：Only when you realize the importance of foreign languages ___them well. A：you can learn B：can you learn C：you learned D：did you learn ...

15：In this experiment you can appreciate the importance of this center: its role in dreaming is(primordial) . B：primeval C：ordinary D：significant E：remarkable ...

11： External trade is of little importance to New Zealand. ...

11：He made another wonderful discovery, ___ of great importance to science. A：which I think is B： which I think it is C： which I think it D： I think which is ...

(单选题)15: They attached great importance ____ the friendship between the two countries. A: for B: of C: with D: to ...

(单选题)21: I believe his invention ______of great importance to the industrial development of that country. A: be B: to be C: being D: been ...

(单选题)50: A:The plan（ ）for the trip is of great importance , I think . B:I see, but John is sure to work it out on time. A: made B: to be made C: making D: has been made ...

(单选题)11: He put forward a theory, _______ of great importance to the progress of science of technology. A: I think which is B: which I think is C: which is I think D: I think it is ...

(单选题)13: Our teacher ___ great importance to listening comprehension. A: attaches B: gives C: takes D: makes ...

(单选题)1: Many a student ______ the importance of learning a foreign language. A: have realized B: has realized C: have been realized D: has been realized ...