______ 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
______ 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
A