下列说法中，正确的是
| A．在化学反应过程中，发生物质变化的同时不一定发生能量变化 |
| B．破坏生成物全部化学键所需要的能量大于破坏反应物全部化学键所需要的能量时，反应为吸热反应 |
| C．反应产物的总焓大于反应物的总焓时，反应吸热，ΔH＞0 |
| D．ΔH的大小与热化学方程式的计量系数无关 |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |
My friend showed me round the town, ______ was very kind of him. 
| A．which | B．that | C．where | D．it |