Question

【題目】I should not have laughed if I ______ you were serious.
A.thought
B.would think
C.had thought
D.have thought

Answer 1

【答案】C
【解析】句意：如果我知道你是認(rèn)真的話我就不笑了。本句意思是當(dāng)時(shí)不知道所以笑了，表示與過去事實(shí)相反，用“had thought”表示對過去情況的虛擬 。故答案選“C”。