【推荐2】这种教学方法一定非常有效，因为我看到许多老师运用这种方法教学。
This teaching method ___ be very effective, for I’ve seen it ______ teaching by many teachers.

【推荐3】________ (必须采取措施) to encourage farmers to increase their production of the herb. (根据汉语提示完成句子)

【推荐3】It_________________________ last night，for the road was quite muddy.
昨天晚上一定下雨了，因为路上很泥泞。

【推荐1】“What?!” I tried to turn on my brain but the engine just wouldn’t start.
(Please describe the situation when you couldn’t find your key in front of the door.) (按要求仿写)
____________________________________________________________________

【推荐2】Nobody noticed when he entered the classroom; he ___________________it from the back door.(slide)
没人注意到他什么时候进的教室；他一定是从后门溜进来的。

【推荐3】从你的话看，她一定告诉了你所有的事情。(must＋have done)
From what you said, she _______ all about it.