AFTER WALKING FOR THREE HOURS, WE STOPPED TO LET THE OTHERS ______...

17. - BAI TAP ON THI THEO CHU DE +DAP AN 17. - BAI TAP ON THI THEO CHU DE +DAP AN
BAI TAP ON THI THEO CHU DE +DAP AN

17. After walking for three hours, we stopped to let the others ____________ with us.

a. to catch b.

catching c.

catch d. a &

b