I will visit Austria ______ the invitation of my friend this summer vacation．
| A．by | B．for | C．to | D．at |
It suddenly occurred to himhe had left his keys in the office.
| A． | whether | B． | where | C． | which | D． | that |
I'vethe habit of calling in on my grandparents on my way home from school.
| A． | come into | B． | gone into | C． | got into | D． | run into |
My brother would like to buy a good watch butwas available from that shop.
| A．nothing | B．none | C．no one | D．neither |
We have bought so much food now that Suzie won’t be with us for dinner.
| A．may not | B．needn’t | C．can’t | D．mustn’t |
The Smiths don't usually like staying athotels, but last summer they spent a few days at a very nice hotel by ________ sea.
| A． | /; a | B． | the; the | C． | /; the | D． | the; a |