IT RAINED HEAVILY, (SO/ ALTHOUGH/ AS/ AND ) THEY COULDN’T GO SWIMM...

4. - ANH9- KIEM TRA HKII ( HAY- CO DAP AN)
ANH9- KIEM TRA HKII ( HAY- CO DAP AN)

4.

It rained heavily, (so/ although/ as/ and ) they couldn’t go swimming in the river .