【推荐2】问题还是他们能否帮助我们解决这个难题。

The question remains ______.

【推荐3】完成句子
61. Tom raised his hand as if _______ ___________ something.
汤姆举起手好像要说什么。
62. These new _________   __________medical research will undoubtedly put the clock back by 20 years.
这些禁令将会毫无疑问使医学研究倒退到20年前的状态。
63. _______ _________ she may, she never seems able to do the work satisfactory.
尽管她很努力，然而其工作却不令人满意。
64.—Where did you find him?          
— It was in the lab ______we did experiment ______I found him.
——你是在哪找到他的？——我是在我们做实验的实验室里找到他的。
65. This is _______ _______ everyone’s life; good begets good, and evil leads to evil.
善有善报，恶有恶报，这是一个不争的事实。

【推荐1】Tom soon fell asleep ___________________________ .  
汤姆很快就睡着了, 门还开着。