She still failed in the final exam___hard she worked.A. whatever B wherever C. however D. whenever
You must keep it _______ in mind that education is the first productivity.
This word is wrongly spelt;a letter is _______.
It makes _______ big difference to keep calm when giving _______ first aid.
_______, the experiment will be successful.
In the front of the hall _______ a group of pupils, who were listening to the lecture attentively.