This company earned a lot of money. As a result，the members' personal income rose by a(n)________of 13 percent.
| A．average |
| B．ordinary |
| C．common |
| D．usual |
The time and effort he has devoted during the past few years ______ trees in that remote area is now considered to be of great value.
| A．plant | B．planting |
| C．to plant | D．to planting |
.The child broke his father’s favourite vase; Although knowing he would ____ to be punished, he told his father the truth.
| A．mean | B．deserve |
| C．devote | D．avoid |
Children should be instructed to put things _____ they belong in their early childhood.
| A．where | B．in which |
| C．to which | D．what |
______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.
| A．To attach | B．Attach |
| C．Attached | D．Having attached |
With ________ word “PM 2.5” repeatedly appearing in ________ media reports, the public can’t help wondering what it really means.
| A．the; \ | B．a; the |
| C．the; the | D．\; the |