A. which
Đáp án C
Giải thích: no matter what it is: không quan trọng nó là cái gì
The classroom windows and sliding doors (5) ________ open to the outside most of the year. The roof is a big, wooden circle. Children love to play and run on it.
It can be a very big surprise if you expect to shakes hands and get a kiss or a hug (33)_____.