At times the balance in nature is ______ , resulting in a number of possibly unforeseen effects.
I can’t go to the New Year’s concert,_____,100 dollars is just too much for me to spend in one evening. A . in other words. B that is. C in particular. D I mean
If you don’t wait _______ the red light, you will be punished by the policeman.
---- You shouldn’t have gone there alone last night. ---- But I ______, because Xiao Wang went there, too.
______, the concert began.
He has got himself into a dangerous situation ______ he is likely to lose control over the plan.