Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
| A．不填；a | B．the；a | C．不填；不填 | D．the；不填 |
If you___bright sunlight___dry wood with a magnifying glass,it will start burning
| A．expose;to |
| B．concentrate;on |
| C．aim;at |
| D．focus;on |
George is going to talk about the geography of his country,but I’d rather he___more on its culture
| A．focus |
| B．focused |
| C．would focus |
| D．had focused |
Computers and mobile phones,though they are indeed making our life___and more____,have reduced the need for face-to-face communications
| A．easily;efficient |
| B．easier;efficient |
| C．easy;efficiently |
| D．easily;efficiently |
I’m afraid he’s more of a talker than a doer,which is___he never finishes anything
| A．that |
| B．when |
| C．where |
| D．why |
Ted came for the weekend wearing only some shorts and a T-shirt,___is a stupid thing to do in such weather
| A．this |
| B．that |
| C．what |
| D．which |