Mary has recently got engaged ________ a foreign teacher, who has been engaged ________ education research for years

3. They will fly to Washington, ___________ they plan to stay for two or three days.

I hear Li Yuan wants to be a cosmonette(女宇航员) like Liu Yang. It’s difficult for her.—But I think she can ______ her goal after work hard.

If you have any trouble , be sure to call me .— .

better put the milk in the fridge,which has a _______ to go bad in hot weather