The question _______ we can get enough coal for the winter has not been cleared up yet .
Cherry was afraid she wouldn’t fit in at her new school, ______ she made friends quickly.
With the rise of modern communication tools, handwritten letters ______ by emails.
---Have you seen Jane this week?---No, but I ________ her call on my way to work this morning.
______ well, you need to have a good sense of balance.
I ________ be a little bit slow, but at least I don’t make stupid mistakes.