I can see a pen ______some pencils on the desk.

I can see a pen ______some pencils on the desk.

#56160

are

and

but

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---Why are you busy these days?--         I am writing a book.

#56484

since

for

because

— It’s one o’clock now. I must go. — It’s raining outside. Don’t leave       it stops.

#58482

when

since

while

until

I don’t like science _______ it’s difficult.

#55838

but

because

and

—We can’t be successful ________ we keep working hard.—I agree with you.

#56381

unless

because

when

       Lily             Sam likes popular songs, so they went to Zhou Jielun’s concert together last night.

#55420

Both, and

Either, or

Not only, but also

Neither, nor