---I called you yesterday afternoon, but there was no reply.

---I ______ a dolphin show the zoo with my cousins.

A．watched

B．will watch

C．am watching

D．was watching

作为应对油气时代过后能源问题的一条解决途径，甲醇受到越来越多的关注。已知在常温常压条件下，1gCH₃OH（l）完全燃烧释放出22.7kJ的热量，则表示甲醇燃烧热的热化学方程式为

A．CH₃OH(l) +O₂(g) ="=" CO₂(g) + 2H₂O(l)；△H＝－726.4kJ/mol

B．2CH₃OH(l) + 3O₂(g) ="=" 2CO₂(g) + 4H₂O(g)；△H＝－1452.8kJ/mol

C．CH₃OH(l) +O₂(g) ="=" CO₂(g) + 2H₂O(l)；△H＝726.4kJ/mol

D．2CH₃OH(l) + 3O₂(g) ="=" 2 CO₂(g) + 4H₂O(l)；△H＝－1452.8kJ/mol