Nowadays, many people walk to work ____Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
So much progress _____ in the past few months that she now has no difficulty in making herself understood in English.
Much to my, I’m unable to accept your kind invitation.
—Shall we hang out tomorrow morning? — ________ I’ll save the morning for my homework.
I have been in low spirits ______she left our school
We have to ________ the picnic because of the heavy rain.