24. _____ tomorrow, our ship will set sail for Macao.
| A．However the weather is like | B．However is the weather like |
| C．whatever is the weather like | D．Whatever the weather is like |
It was not until he became very ill ______ he went to see a doctor.
| A．what | B．that | C．when | D．then |
______ from the moon, the earth looks like a beautiful blue planet.
| A．Seeing | B．Seen | C．To see | D．See |
___we do this today or tomorrow doesn’t make much difference.
| A．When | B．Whenever | C．Whether | D．If |
—Do you think I should wear a thick coat?
—Yes, certainly. ______, you also need a compass.
| A．What’s more | B．In other words | C．Keep in touch | D．On the contrary |
Only when he arrived home _____ that he had left his key in the office.
| A．will he realize | B．he did realize | C．did he realize | D．should he realize |