—China develops so fast.
—That’s true. It ______ a lot already.
A．changesB．changedC．will changeD．has changed
D
動詞的時態(tài)。句意：—中國發(fā)展如此迅速。—是呀。它已經(jīng)發(fā)生了很大的變化。表示發(fā)生在過去對現(xiàn)在仍有影響的動作。所以，判定為現(xiàn)在完成時。故選D。
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