问题
选择题
______ difficult it is, he is determined to ______ the experiment.
A．No matter how; have a go at
B．However; have a go for
C．Whatever ; have a go
D．No matter what; have a go at
答案
答案：A
考查让步状语从句和固定短语。句意“无论有多么困难，他都决心尝试做那个实验。”修饰形容词应该用how，排除C、D；have a go at“尝试”。故选A。