Being a teacher always encouraging students to think for themselves, I won't tell them answers until they __________ on a math problem for more than an hour.
A．have worked B．will have worked
C．will have been working D．had worked
He could speak English fluently because he __________ it for four years when he was a college student.
A．had studied B．have been studying C．studied D．was studying
Looking at my mother's ___________ face, I regretted not having told her my whereabouts on the phone.
A．worrying B．worried C．anxioused D．satisfied
--This decision really upsets me.
--- _______, Ellen. Things will work out well.
A．Don't mention it B．I don't think so.
C．No problem D．Take it easy.
These suggestions are perfectly in _____ tune with our thoughts on ______ subject.
A．the; the B．/ ; the C．/ ; / D．a; the
假如你是一名学生，你校学生会要组织一次徒步旅行。现在，请你根据以下内容以学生会的名义写一份书面通知。字数120词左右。
主要内容：
1．为了增强体质，走近大自然，我们决定徒步旅行。欢迎高一学生踊跃参加，并于4月18日前到学生会报名登记。
2．旅行时间：星期天(4月19日)。早晨7点到校，7点半出发，下午5点返回。
3．注意事项：穿运动鞋和易被认出的衣服，自带水和午餐。
4．发通知时间是4月15日。
参考词汇：
1．sign one's name报名 2.the Students' Union学生会
________________________________________________________________________
