Eye doctors recommend that a child’s first eye exam____ at the age of six months old.
| A．was | B．be | C．were | D．is |
--- When will you be through with your work, Jones?
--- ? My boss usually finds something for me to do at the last minute．
| A．Who knows | B．Would you help me |
| C．I beg your pardon | D．Anything the matter |
--- Has Mr．Tom White arrived? --- Yes, already． he wait outside or just come in?
| A．Shall | B．May | C．Could | D．Must |
According to news reports personal of guns in the USA causes a lot of trouble．
| A．wealth | B．possession | C．matter | D．problem |
Carbon dioxide from burning fuels is the most common of the so – called greenhouse gases．
| A．producing | B．having been produced |
| C．to be produced | D．produced |
Because of the Russian gas limit to Europe, attempts to use botanical fuel as a source of power．
| A．have made | B．having made |
| C．are being made | D．will be making |