单项选择题

A．to be worried
B．to worry
C．to be worried about
D．to worry about
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单项选择题
A．investigateB．repairC．exploreD．test
A．investigate
B．repair
C．explore
D．test
单项选择题
A．She doesn’t think Professor Brown will give an exam.B．Professor Brown won’ t finish grading the exams.C．Exams are usually given during the last week of classes.D．Professor Brown probably won’ t change the exam date.
A．She doesn’t think Professor Brown will give an exam.
B．Professor Brown won’ t finish grading the exams.
C．Exams are usually given during the last week of classes.
D．Professor Brown probably won’ t change the exam date.
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