Migrant workers in Singapore have been praised for their quick action in saving a woman after her car was swallowed by a sinkhole.Social media videos show a 3-metre (10-foot) deep sinkhole suddenly appearing on Saturday evening along Tanjong Katong Road east of the citystate, causing a black Mazda to topple sideways into the hole.Immediately, nearby construction workers can be seen rushing to her rescue. One worker leans into the sinkhole as two more workers approach the edge. As the driver...