Though they are not very sure of the long-term ,all the scientists agree to start_____,all the scientists agree to start the research immediately.
On the north of the bank _____ the Opera House, _____ was built two hundred years ago.
One learns a language by making mistakes and ________them
________ on the top of the hill, you can enjoy a good view.
I wonder whether the soldier is one of those who _______ abroad to keep peace.
---English has a large vocabulary, hasn’t it? ---Yes. _____ more words and expressions and you will find it easier to read and communicate.