语法与词汇21.The department chairman______with thanks the assistance of all the faculty members for getting the celebration ready in a short time.
【正确答案】
D
【答案解析】本句意为“系主任就全体教员在短时间内协助完成了庆祝活动的准备工作而致谢”。acknowledge的名词形式为acknowledgement，意思是“感激”，短语acknowledge with thanks意为“致谢”；express表达；declare宣告；announce宣布，通告。因此正确答案为D。