Bamboo is ___ grass, but not tree.
| A．a type of | B．a pile of | C．a kind of | D．a piece of |
—May I speak to Mr.Smith?
—I am afraid not.He is at a meeting now.It's not ________.
| A．reliable | B．convenient |
| C．beneficial | D．available |
________ his strength failed and he dropped behind in the race.
| A．Quietly | B．Actually |
| C．Practically | D．Gradually |
To tell the truth, what you said was too ________ for us to understand.
| A．complex | B．comfortable |
| C．concrete | D．common |
In order to be a strong partner with the AsiaPacific region, American President Obama thinks it is ________ to have a strong relationship with China.
| A．vital | B．potential | C．specific | D．awkward |
Doctors often advise us to pay more attention to our diets and mental health and to take ________ examinations.
| A．relevant | B．regular | C．adequate | D．accurate |