226. Einstein lived the rest of his life quietly in America and _____ American nationality in 1940.
| A．bought | B．took part in | C．joined | D．Took |
I like getting up very early in summer. The morning air is so good ______.
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
On the north of the bank _____ the Opera House, _____ was built two hundred years ago.
| A．is lying; where | B．lies; what | C．lies; which | D．lying; that |
One learns a language by making mistakes and ________them
| A．correct | B．to correct | C．to correct | D．correcting |
________ on the top of the hill, you can enjoy a good view.
| A．Stand | B．Stood | C．Standing | D．To stand |
I wonder whether the soldier is one of those who _______ abroad to keep peace.
| A．has been sent | B．have been sent | C．have sent | D．has sent |