If mankind is trying to find new places in space to live and get new resources, it is fine.
| A．the; the | B．/; / | C．a; the | D．the; a |
On the closet _____ a pair of trousers his parents bought for his birthday.
| A．lying | B．lies | C．lie | D．is laid |
Professor Smith, along with his assistants, __ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
Could you please tell me where you bought the shoes __ yesterday?
| A．tried on | B．put on | C．had on | D．pulled on |
. __ many times, but he still wouldn't listen.
| A．Having told | B．Having been told |
| C．He having been told | D．He was told |
He is one of the boys who _____ here on time. He is the only one of the boys who _____ here on time.
| A．has come; have come | B．have come; has come |
| C．has come; has come | D．have come; have come |