In this experiment, the famous professor showed three different __________ to the study of physics.
It sounds like something is wrong with the car’s engine. ___ we’d better take it to the garage immediately.
Jane won’t join us for dinner tonight and ___.
When deeply absorbed in work, ___he often was, he would forget all about eating or sleeping.
He missed ___ gold in the high jump, but will get ___ second chance in the long jump.
Jim managed to get into his house without the key. ___?