1 . There are few records of the event, _________, due to the lack of written documentation.
由于缺乏书面记录，关于这一事件的记录很少，如果有的话。

2 . The costume designer will make alterations ________________ to ensure the actors are comfortable.
必要的时候，服装设计师将会做出改动以确保演员们穿着舒适。

3 . The director will extend the play’s run ________________ to accommodate more audiences.
如果可能的话，导演将会延长这部戏剧的演出时间以容纳更多的观众。

4 . 政府迅速意识到，除非处理得当，污染只会变得更严重。
The government quickly realized that, ______, the pollution would only get worse.

5 . 看到他们失望的表情，杰克叫他们把厨房打扫干净，并帮他们给妈妈做早餐。
Seeing their disappointed expressions, Jack told them to clean up the kitchen while ______ Mother.

6 . 走了两个小时后，他应该休息一下，但是他不愿意。
After a two-hour walk, he should have a rest but ______. (will)

7 . From a classic viewpoint, enjoy Lower Falls, the Yellowstone River, and the breathtaking colors of the canyon (峡谷) while ______ (learn) about the area’s natural and human history. (所给词的适当形式填空)

8 . Try to seek out chances to renew friendships. How to do it? Just spend face-to-face time together ________ possible. (用适当的词填空)

9 . 教材原句：If not, we surely must find the owner, for he will certainly miss it. (if型省略结构)
仿写：有人告诉我们他将于今晚回来，如果是这样，我们的会议将于明天举行。
We are told that he will come back tonight, and ________________.

10 . 在备战东京奥运会时，运动员们承受了很大的压力。
_____________ the Tokyo Olympic Games, the athletes were under great stress.