I can hardly imagine Peter ________ across the Atlantic Ocean in five days.
| A．sail | B．to sail | C．sailing | D．to have sailed |
________ was known to us all that Johnson had broken his promise ________ he would give each of us a small gift.
| A．As；which | B．What；that |
| C．It；that | D．It；which |
Modern science has given clear evidence ________ smoking can lead to many diseases.(2011·天津，13)
| A．what | B．which | C．that | D．where |
The notice came around two in the afternoon ________ the meeting would be postponed.(2012·江苏)
| A．when | B．that | C．whether | D．how |
I made a promise to myself ________ this year，my first year in high school，would be different.(2012·浙江)
| A．whether | B．what | C．that | D．how |
At first he hated the new job but decided to give himself a few months to see ________ it got any better.
| A．when | B．how | C．why | D．if |