Mr. Smith, I should tell you this is the fifth time you ______ me for my twin sister.
| A．have mistaken | B．are mistaking |
| C．mistook | D．are mistaken |
At sixty, Maugham decided to withdraw from the theater and wrote The Summer Up, in which he tried to review what he _______ from his life and literature.
| A．had learned | B．has learned | C．was learning | D．would learn |
I was once ashamed to admit my weakness, but now I have no such feeling and I _______ myself much discomfort.
| A．bring | B．offer | C．save | D．promise |
It was several minutes _______ we realized what was happening~our dog was trapped in a newly-dug tunnel.
| A．since | B．before | C．until | D．while |
Many restaurant menus include the origins of a dish, _______ it is prepared, what the main ingredients are, and which farms the ingredients come from.
| A．when | B．how | C．what | D．which |
Our company is going on very well. _______ dozens of local women, we produce handmade goods with unique designs that sell well overseas.
| A．To employ | B．Being employed | C．Employed | D．Employing |