Ok, since many of you have guess it right, I announce the
correct answer here.
1. Serangoon Interchange.
2. Clementi and Sengkang Interchanges.
3. Tibs 925, Kranji Way.
4. SBST 36, East Coast Park car-park F3 (near Sparks @ Marine
Parade), this service will turn into the car-park on its way to
Marine Parade & the city, but will not turn in on its return
journey to the airport. (cos there's no right turn along the
ECP)
(Service 63 return back to Eunos at the former Rumah Tinggi
terminal, but my question highlighted that the bus will not turn
into the car-park on its RETURN journey. Actually, I have not been
to the former Rumah Tinggi terminal, so don't know whether the
terminal is actually a public car park or not.)
(For service 92, it does not turn into any car park, it only stop
by Ghim Moh terminal on its way to Buona Vista MRT.)
(As for question 4, maybe there's more than one answer.)
5. Sentosa.