1 . However, online learning ________________(有利也有弊).(根据汉语提示补全句子)

2 . Over time, however,   ____________ some scientists ____________ their long-term use can sometimes harm ____________ the land ____________ people’s health.
然而, 随着时间的推移，一些科学家发现它们的长期使用会造成土地受损，对人们的健康造成危害。

5 . ________ Jane________ her brother is going to the movies this weekend. One of them has to stay at home to look after their sick mother.

A．Neither; nor

B．Either; or

C．Both; and

D．Not only; but also

7 . John is good at doing sports.He________ climbs mountains________ plays soccer at 8:00 every Sunday morning.

A．neither...nor

B．either...or

C．not only...but also

D．both...and

9 . In China, more and more cities have their own “white bike” programmes. ________ (无论本地人还是游客都愿意使用共享单车，因为这是一种便宜而便利的方式用以节约能源、 减少空气和噪音污染、享受在城市中锻炼的益处).

10 . Green is the color that has the ability to reduce pain and relax people both mentally ______physically. （用适当的词填空）