(单选题)44: When there’s a doubt, the chairman’s decision is ________. A:   right B:   definite C:   fixed D:   final ...

(单选题)38: When a spacecraft travels, one of the major problems is reentry into the Earth’s ( ). A: surface B: atmosphere C: attitude D: bent ...

(单选题)20: This boy was _______ for what he had done in the class. A: scolded B: overcome C: inclined D: displayed ...

(单选题)14: He regretted ( ) her the truth. A: having told B: to have told C: had told D: to tell ...

(单选题)40: This watch is ( ) by hand, not by machine, so it is very expensive. A: flat B: coined C: bored D: manufactured ...

(单选题)28: The airplane took off soon. It was like being on an old train ( ) from side to side and going faster and faster. A: surrounding B: foregoing C: swaying D: frowning ...

(单选题)16: One of the main reasons for air pollution is that many cars _______ smoke into the atmosphere. A: gather B: hire C: discharge D: escape ...

(单选题)10: A new theory ( ) before it can be put into practice. A: must be tested B: be tested C: can be tested D: to be tested ...

(单选题)40: ______ you eat the correct foods ______ be able to keep fit and stay healthy. A: Only if; will you B: Only if; you will C: Unless; will you D: Unless;you will ...

(单选题)24: The manager spoke highly of such ______ as loyalty, courage and truthfulness shown by his employees. A: virtue B: features C: properties D: characteristics ...