I watched the man for a long time and wanted to know .
| A．whether I have seen him before | B．where I had seen him before |
| C．that I had seen him before | D．when did I see him |
—Do you know ______ Tom was punished by his father?
—That was ______ he refused to go to school.
| A．why; because | B．when; why | C．how; when | D．why; why |
This cake is very sweet. You ______ a lot of sugar in it.
| A．should put | B．might put | C．could have put | D．must have put |
To keep slim, many young girls prefer going on a ______.
| A．food | B．diet | C．healthy | D．dinner |
—What do you think of the story?
—Wonderful! It ______ my childhood.
| A．reminds me in | B．reminds me of |
| C．brings me to | D．reminds me to think of |
______ life began on earth is one of the biggest puzzles that scientist found hard ______.
| A．How; solving | B．When; to be solved |
| C．How; to solve | D．Which; to solve |