Lawrence Craven, a doctor from the USA, is the author of several published reports, one of _____ introduced the idea in 1953 _____ aspirin could reduce the risk of heart attacks.
| A．them; when | B．which; that | C．what; that | D．which; when |
It suddenly _______ to me that I should call him up to make an appointment with him.
happened
taken place
occurred
came about
Americans of all religions _______ Thanksgiving, a happy holiday on the fourth Thursday of each November.
| A．celebrate |
| B．join in |
| C．wish |
| D．congratulate |
—James should give up the idea of winning everyone’s respect and focus on his own work.
—_______. How did you know that?
| A．You are not getting it |
| B．Exactly—one step at a time |
| C．You make it sound so easy |
| D．Thank you for bringing it to my attention |
----Jack can’t concentrate on his lessons recently.
----Yes, that may ________ why he did so badly in the last test.
| A．answer for | B．account for |
| C．call for | D．stand for |
The acting is so ________ that it makes you believe that it is one of the best meals that he has ever tasted.
| A．enthusiastic | B．fundamental |
| C．convincing | D．optimistic |