She was so upset by the accident that she couldn’t ________ to explain just what happened. [ ]

Did you enjoy the snow last night?-Yes,but I wish I ________ a cold.[ ]

Three years ago，a society was set up to________the endangered animal and plant life from dying out in this area.

ot______ puzzled, for I simply cannotunderstand how I could have made such a stupid mistake.

I can’t find any ______to show my thanks to you.—You are welcome.