考博英语模拟试题(一)Simulated Test 1 Part One: Structure & Written ExpressionDirections: In each question decide which of the four choices given will most suitably complete the sentence if inserted at the place(s) marked. Put the letter of your choice in the ANSWER SHEET. (25%)1. After the lean musical years in the 1630s, there had been a in Monteverdis operatic career: a new production of LArianna was staged in 1640, and three new operas appeared within two years.A. r