The storm sweeping over this area now is sure to cause _____ of vegetables in the coming days.
| A．rarity | B．scarcity | C．invalidity | D．variety |
Experts say walking is one of the best ways for a person to _______ healthy.
| A．maintain | B．stay | C．live | D．preserve |
If you want to ________ a pleasant visit, find out as much as possible about the manners and customs of your host country.
| A．ensure | B．deserve | C．secure | D．serve |
It’s true that the old road is less direct and a bit longer. We won’t take the new one, _______, because we don’t feel as safe on it.
| A．somehow | B．though | C．therefore | D．otherwise |
Evidence came up ________ specific speech sounds are recognized by babies as young as 6 months old.
| A．what | B．which | C．that | D．whose |
The money spent on healthcare for people aged over 60 ________ 41 percent of the total spent last year in China.
| A．took in | B．took up | C．took over | D．took after |