If we work with a strong will, we can overcome any difficulty, ________great it is.
| A．whatever | B．however | C．wherever | D．whenever |
If ____ in, viruses can result in illness or even death.
| A．breathe | B．breathing |
| C．breathed | D．to breathe |
By the 1920s, Howard Carter ____ an explorer.
| A．has become | B．had become |
| C．became | D．would become |
Three mountains, Meili, Baimang and Haba, _____ are covered with snow, tower over the land.
| A．that | B．what |
| C．which | D．as |
Is _______ three hours _______ the poor boy to come to school on foot?
| A．it; that it takes | B．there; that it takes |
| C．there; when | D．it; that |
No. 1 Middle School of Anxiang is the very place ______ Song Zhenyu, the Provincial science top of Hunan in 2014, was studying.
| A．that | B．which |
| C．where | D．from which |