_____ by the beauty of nature, the girl from London decided to spend another two days on the farm.
| A．Attracting | B．Attracted | C．To be attracted | D．Having attracted |
. By the year 2020 scientists _____ a lot of research on AIDS.
| A．had done | B．do | C．are doing | D．will have done |
_____ is commonly believed that the play was written by Shakespeare.
| A．It | B．That | C．What | D．As |
He made a promise____he would achieve the success that his parents were looking forward to.
| A．what | B．when | C．that | D．which |
After a knock at the door, the children heard his mother’s voice him．
| A．calling | B．called | C．being called | D．to call |
If we canour present difficulties, then everything should be all right?
| A．come across | B．get over |
| C．come over | D．get off |