Zhang Ming has learned English for two years, but he can ______ understand native speakers.

A．hardly

B．certainly

C．always

D．almost

下列说法中正确的是 (    )

A．一杯水倒去一半，它的比热容减为原来的一半

B．吸收热量多的物质，比热容一定大

C．高温物体放出的热量一定多

D．质量相同的水和煤油，吸收了相同的热量，煤油升高的温度大于水升高的温度