中国大学MOOC: There have been major new developments in satellite ______.
举一反三
- ______ there ______ any new developments in the past 20 years? A: Have… been B: Will…be C: Had…been D: Would… be
- 中国大学MOOC: The new rules for environmental protection have been (wide) ________ accepted by the public.
- 中国大学MOOC: A major objective in designing new ceramics is to overcome
- 中国大学MOOC: Unfortunately ,the new editon of dictionary is _______in all major bookshops .
- 中国大学MOOC: Drug______ has long been a major problem for the authorities there.