The factory produces half a million pairs of shoes every year, _________ are sold abroad.
| A．80% of them | B．80% of that | C．80% of the shoes | D．80% of which |
One day I _______ a newspaper article about the retirement of an English professor at a nearby state college.
| A．came across | B．came about | C．came over | D．came out |
— Where have you been?
— I got stuck in the heavy traffic, or I ________ here earlier.
| A．had arrived | B．would have come | C．would come | D．was |
—What do you think of their marriage?
—______, if I were Kate, I would not marry him.
| A．Generally speaking | B．I have no idea | C．To be honest | D．To my surprise |
Americans eat _______ vegetables each person today as they did 20 years ago..
| A．twice as many | B．many as twice | C．as many twice | D．as twice many |
— Would you allow me ________ here?
— Sorry. We don’t permit _________ in the lab.
| A．smoking; smoking | B．to smoke; to smoke | C．smoking; to smoke | D．to smoke; smoking |