The number of red-crowned cranes is getting ___________.
| A．small and small | B．little and little |
| C．smaller and smaller | D．less and less |
相关试题
Here’s Mary’s plan for one week during her summer vacation. What kind of plan is this? 
| A．A trip plan. | B．A party plan. |
| C．An eating plan. | D．An exercise plan |
Excuse me, could you tell me ________?
A. where are they
B. how did they go there
C. when they will come back
In order to keep our students safe, strangers ________before entering the school yard.
A. will check B. will be checked C. checked
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