—The plane is due to take off at 7:50 from the airport. ______ we fail to arrive there in time?
—Try to take another flight then.
A. As if B. Even if C. Only if D. What if
Our teachers often encourage us that every minute we spend on studying will finally _______ in the near future.
A. run out B. go off C. come out D. pay off
Fever _______ sickness. You should see a doctor at once.
A. explains B. informs
C. introduces D. indicates
Not all the patents________ have been recognized.
A. to be examined B. being examined
C. examined D. having been examined
Unless______, this law will make life difficult for farmers.
A. changed B. changing
C. being changed D. is changing
This year many factories raised the prices of clothes to _____ the higher cost to customers.
A. pass by B. pass on
C. pass for D. pass through
